This standard applies to twin-screw pumps and pumping units with flow rates from 0.55 to 280 l/s (from 2.0 to 1000 m3/h) and pressure from 0.25 M
GOST 20572-1988 Referenced Document
GOST 15150-1969 Machines, instruments and other industrial products. Modifications for different climatic regions. Categories, operating, storage and transportation conditions as to environment climatic aspects influence